Energy storage inverter

Abstract

The utility model provides an energy storage inverter. The energy storage inverter comprises a box body; the plurality of output interfaces are arranged on the side wall of the box body; the power conversion board is arranged in the box body; the direct current circuit board is arranged in the box body and is electrically connected with the power conversion board and the output interface; the alternating current circuit board is arranged in the box body and is electrically connected with the power conversion board and the output interface; the communication control board is arranged in the box body and electrically connected with the power conversion board and the output interface, and the direct current circuit board, the communication control board and the alternating current circuit board are all arranged on the same side of the power conversion board and are sequentially arranged in the first direction. According to the energy storage inverter provided by the utility model, the circuit board in the energy storage inverter is modularly arranged, so that the communication control board, the alternating current circuit board and the direct current circuit board are arranged in different areas, and therefore, the wiring in the energy storage inverter can be clearer and more concise, and the maintenance of equipment is facilitated; the problems of complicated and disordered internal structure, difficulty in maintenance and the like of the energy storage inverter are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and in particular to an energy storage inverter. Background Art

[0002] Currently, the layout of the PCBA (Printed Circuit Board Assembly) inside the energy storage hybrid inverter box in related technologies is usually in a cavity, with the power board placed at the bottom of the box near the heat sink, and the control circuit placed inside the box and separated from the power board by support columns. The functional areas of the PCBA and inductor components are usually not distinguished inside, but the boards are laid out and divided according to the PCBA's own routing design. This design has problems such as complex and confusing internal wiring, difficult maintenance, irregular box interface layout, and excessively long lead wires, which not only increases assembly costs but also increases the difficulty of maintenance.

[0003] Therefore, how to design an energy storage inverter with a clear structure and reduced maintenance difficulty and cost has become an urgent problem to be solved. Utility Model Content

[0004] The utility model aims to at least solve the problems of complex and chaotic internal structure of the inverter and difficulty in maintenance.

[0005] To this end, a first aspect of the present invention provides an energy storage inverter.

[0006] In view of this, the first aspect of the present invention proposes an energy storage inverter, including: a box body; multiple output interfaces, arranged on the side wall of the box body; a power conversion board, arranged in the box body; a DC circuit board, arranged in the box body, electrically connected to the power conversion board and the output interface; an AC circuit board, arranged in the box body, electrically connected to the power conversion board and the output interface; a communication control board, arranged in the box body, electrically connected to the power conversion board and the output interface, the DC circuit board, the communication control board and the AC circuit board are all arranged on the same side of the power conversion board, and are arranged sequentially along the first direction.

[0007] The energy storage inverter provided by the present invention includes a housing, multiple output interfaces, a power conversion board, a DC circuit board, an AC circuit board and a communication control board. Multiple output interfaces are arranged on the side walls of the housing and can be connected to other devices. The DC circuit board, the communication control board and the AC circuit board are all arranged in the housing and on the same side of the power conversion board, and are arranged in sequence along the first direction, so that the circuit boards are partitioned, so that the DC circuit board, the AC circuit board and the communication control board can be electrically connected to the power conversion board and the output interface separately, making the internal wiring clearer and simpler. It can be understood that the present application modularizes the circuit boards inside the energy storage inverter so that the communication control board, the AC circuit board and the DC circuit board are partitioned, so that the wiring inside the energy storage inverter can be clearer and simpler, which is beneficial to the maintenance of the equipment and solves the problems of complex and chaotic internal structure and difficult maintenance of the energy storage inverter.

[0008] The first direction may be the length direction, width direction or extension direction of the side wall of the box.

[0009] The energy storage inverter provided by the present invention may also have the following additional technical features:

[0010] In some embodiments, optionally, along the thickness direction of the power conversion board, a gap is set between the DC circuit board and the power conversion board, a gap is set between the communication control board and the power conversion board, and a gap is set between the AC circuit board and the power conversion board.

[0011] In these embodiments, the DC circuit board and the power conversion board can be spaced apart along the thickness of the power conversion board; the communication control board and the power conversion board can be spaced apart along the thickness of the power conversion board; and the AC circuit board and the power conversion board can be spaced apart along the thickness of the power conversion board. This facilitates independent operation of each circuit board and prevents mutual interference between them. Furthermore, spacing between the circuit boards facilitates troubleshooting and component replacement, improving the maintainability and flexibility of the system.

[0012] In some embodiments, optionally, the energy storage inverter also includes: a first support column, arranged between the power conversion board and the DC circuit board, and the two ends of the first support column respectively abut against the power conversion board and the DC circuit board; a second support column, arranged between the power conversion board and the AC circuit board, and the two ends of the second support column respectively abut against the power conversion board and the AC circuit board; a third support column, arranged between the power conversion board and the communication control board, and the two ends of the third support column respectively abut against the power conversion board and the communication control board.

[0013] In these embodiments, a first support column can be provided between the power conversion board and the DC circuit board, with the ends of the first support column respectively abutting the power conversion board and the DC circuit board. In this way, the power conversion board and the DC circuit board can be separated by the first support column, thereby ensuring the stability of the circuit board. Similarly, a second support column can be provided between the power conversion board and the AC circuit board, with the ends of the second support column respectively abutting the power conversion board and the AC circuit board. A third support column can be provided between the power conversion board and the communication control board, with the ends of the third support column respectively abutting the power conversion board and the communication control board.

[0014] In some embodiments, optionally, the first support column, the second support column, and the third support column have different lengths.

[0015] In these embodiments, the lengths of the first, second, and third support columns can be set to different values. This allows for different spacing between the DC circuit board, the AC circuit board, the communications control board, and the power conversion board. Specifically, the DC circuit board, the AC circuit board, and the communications control board are staggered and not located on the same horizontal plane, thereby increasing space for air circulation and improving heat dissipation. Furthermore, staggering the DC circuit board, the AC circuit board, and the communications control board ensures sufficient electrical distance between the circuit boards, thereby reducing electromagnetic interference, saving space, and facilitating wiring and maintenance.

[0016] In some embodiments, optionally, the output interface includes: a DC interface, electrically connected to the DC circuit board; a communication interface, electrically connected to the communication control board; an AC interface, electrically connected to the AC circuit board; the DC interface, the communication interface and the AC interface are arranged in sequence along the first direction.

[0017] In these embodiments, the output interface includes a DC interface, an AC interface, and a communication interface. The DC interface is electrically connected to the DC circuit board. The communication interface is electrically connected to the communication control board. The AC interface is electrically connected to the AC circuit board. The DC interface, the communication interface, and the AC interface are arranged in sequence along a first direction. It can be understood that the DC interface, the communication interface, and the AC interface are arranged relative to the DC circuit board, the communication control board, and the AC circuit board, and are all arranged along the first direction. This makes it easy to connect the DC interface to the DC circuit board, the AC interface to the AC circuit board, and the communication control board to the communication interface, further optimizing the internal structural layout of the energy storage inverter and making the wiring clearer.

[0018] In some embodiments, optionally, the energy storage inverter further includes: a radiator installed in the box body for dissipating heat from the power conversion board.

[0019] In these embodiments, a radiator may be provided on the housing to dissipate heat from the power conversion board, thereby ensuring the performance and service life of the power conversion board.

[0020] In some embodiments, optionally, a hollow structure is provided on the side wall of the box body, a radiator is installed outside the box body and located at the hollow structure, and the side of the power conversion board facing away from the DC circuit board is provided in contact with the radiator.

[0021] In these embodiments, a hollow structure can be provided on the side wall of the box, and then a heat sink can be installed outside the box and located at the hollow structure. In this way, the power conversion board in the box can be placed in contact with the heat sink through the hollow structure, thereby further improving the heat dissipation effect. Specifically, the heat generating components on the power conversion board can be placed in contact with the heat sink.

[0022] In some embodiments, optionally, the energy storage inverter further includes: a DC inductor assembly, installed in the box and arranged close to the DC circuit board; an AC inductor assembly, installed in the box and arranged close to the AC circuit board, and the DC inductor assembly and the AC inductor assembly are arranged on opposite sides of the radiator.

[0023] In these embodiments, the DC inductor assembly and the AC inductor assembly can also be independently arranged, so that the DC inductor assembly processes DC power and the AC inductor assembly processes AC power. This not only increases the efficiency of power processing, but also allows the DC inductor assembly and the AC inductor assembly to be independently disassembled and replaced, thereby facilitating daily maintenance and troubleshooting. In specific settings, the DC inductor assembly can be arranged close to the DC circuit board, and the AC inductor assembly can be arranged close to the AC circuit board, thereby facilitating the connection between the DC inductor assembly and the DC circuit board, and facilitating the connection between the AC inductor assembly and the AC circuit board, further simplifying the overall structure of the energy storage inverter. At the same time, the DC inductor assembly and the AC inductor assembly are arranged on opposite sides of the heat sink, so that the heat sink can be used to reduce electromagnetic interference between the DC inductor assembly and the AC inductor assembly.

[0024] In some embodiments, optionally, the energy storage inverter further includes: a filter board, which is disposed in the box and located at the output interface.

[0025] In these embodiments, a filter board may be provided in the box for filtering to prevent electromagnetic interference. Specifically, the filter board may be provided at the output interface, which can improve the filtering effect.

[0026] In some embodiments, optionally, the energy storage inverter further includes: a conductive column, through which the power conversion board and the DC circuit board are electrically connected, and through which the power conversion board and the AC circuit board are electrically connected.

[0027] In these embodiments, conductive posts can be used to electrically connect the power conversion board to the DC circuit board, and vice versa. Providing conductive posts for electrical connection further simplifies the internal layout of the energy storage inverter, making the interior clearer and more concise, thereby facilitating maintenance and repair. The specifications and number of conductive posts can be adjusted based on actual electrical conductivity requirements.

[0028] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 An exploded view of an energy storage inverter according to an embodiment of the present invention is shown;

[0031] Figure 2 One of the structural schematic diagrams of an energy storage inverter according to an embodiment of the present utility model is shown;

[0032] Figure 3 The second structural diagram of the energy storage inverter according to one embodiment of the present invention is shown;

[0033] Figure 4 The third structural diagram of the energy storage inverter according to one embodiment of the present invention is shown;

[0034] Figure 5 FIG4 shows a fourth structural diagram of an energy storage inverter according to an embodiment of the present utility model;

[0035] Figure 6 The fifth structural diagram of the energy storage inverter according to one embodiment of the present utility model is shown.

[0036] in, Figures 1 to 6 The corresponding relationship between the reference numerals and component names is as follows:

[0037] 100 housing, 1002 hollow structure, 101 output interface, 1012 DC interface, 1014 communication interface, 1016 AC interface, 102 power conversion board, 1022 heating device, 103 DC circuit board, 104 AC circuit board, 105 communication control board, 106 first support column, 107 second support column, 108 third support column, 109 radiator, 110 DC inductor assembly, 1102 DC inductor box, 111 AC inductor assembly, 1112 AC inductor box, 112 filter board, 1122 communication filter board, 113 conductive column, 114 mounting bracket, 115 cover. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] Refer to the following Figures 1 to 6 An energy storage inverter according to some embodiments of the present invention is described.

[0041] According to an embodiment of the first aspect of the present invention, Figures 1 to 6 As shown, the first aspect of the present invention proposes an energy storage inverter, including a housing 100, a plurality of output interfaces 101, a power conversion board 102, a DC circuit board 103, an AC circuit board 104 and a communication control board 105. The plurality of output interfaces 101 are arranged on the side wall of the housing 100. The power conversion board 102 is arranged in the housing 100. The DC circuit board 103 is arranged in the housing 100 and is electrically connected to the power conversion board 102 and the output interface 101. The AC circuit board 104 is arranged in the housing 100 and is electrically connected to the power conversion board 102 and the output interface 101. The communication control board 105 is arranged in the housing 100 and is electrically connected to the power conversion board 102 and the output interface 101. The DC circuit board 103, the communication control board 105 and the AC circuit board 104 are all arranged on the same side of the power conversion board 102 and are arranged in sequence along the first direction.

[0042] The energy storage inverter provided by the present invention includes a housing 100, multiple output interfaces 101, a power conversion board 102, a DC circuit board 103, an AC circuit board 104, and a communication control board 105. Multiple output interfaces 101 are arranged on the side walls of the housing 100 and can be connected to other devices. The DC circuit board 103, the communication control board, and the AC circuit board 104 are all arranged in the housing 100 and are located on the same side of the power conversion board 102. They are arranged in sequence along the first direction, thus realizing the partitioning of the circuit boards. The DC circuit board 103, the AC circuit board 104, and the communication control board 105 can be electrically connected to the power conversion board 102 and the output interface 101 separately, making the internal wiring clearer and simpler. It can be understood that the present application modularizes the circuit boards inside the energy storage inverter so that the communication control board 105, the AC circuit board 104, and the DC circuit board 103 are arranged in partitions. This makes the wiring inside the energy storage inverter clearer and simpler, thereby facilitating maintenance of the equipment and solving problems such as the complex and chaotic internal structure of the energy storage inverter and the difficulty in maintenance.

[0043] The first direction may be the length direction, width direction or extension direction of the side wall of the box body 100 .

[0044] In some embodiments, optionally, as Figure 4 As shown, along the thickness direction of the power conversion board 102 ( Figure 4 A space is provided between the DC circuit board 103 and the power conversion board 102, a space is provided between the communication control board 105 and the power conversion board 102, and a space is provided between the AC circuit board 104 and the power conversion board 102.

[0045] In these embodiments, the DC circuit board 103 and the power conversion board 102 can be spaced apart along the thickness of the power conversion board 102, the communication control board 105 and the power conversion board 102 can be spaced apart along the thickness of the power conversion board 102, and the AC circuit board 104 and the power conversion board 102 can be spaced apart along the thickness of the power conversion board 102. This facilitates the independent operation of each circuit board and prevents mutual interference between the circuit boards. Furthermore, providing spacing between the circuit boards facilitates troubleshooting and component replacement, thereby improving the maintainability and flexibility of the system.

[0046] In some embodiments, optionally, as Figure 4As shown, the energy storage inverter also includes: a first support column 106, which is arranged between the power conversion board 102 and the DC circuit board 103, and the two ends of the first support column 106 are respectively abutted against the power conversion board 102 and the DC circuit board 103; a second support column 107, which is arranged between the power conversion board 102 and the AC circuit board 104, and the two ends of the second support column 107 are respectively abutted against the power conversion board 102 and the AC circuit board 104; a third support column 108, which is arranged between the power conversion board 102 and the communication control board 105, and the two ends of the third support column 108 are respectively abutted against the power conversion board 102 and the communication control board 105.

[0047] In these embodiments, a first support column 106 can be provided between the power conversion board 102 and the DC circuit board 103, with the ends of the first support column 106 respectively abutting the power conversion board 102 and the DC circuit board 103. In this way, the power conversion board 102 and the DC circuit board 103 can be separated by the first support column 106, thereby ensuring the stability of the circuit boards. Similarly, a second support column 107 can be provided between the power conversion board 102 and the AC circuit board 104, with the ends of the second support column 107 respectively abutting the power conversion board 102 and the AC circuit board 104. A third support column 108 can be provided between the power conversion board 102 and the communication control board 105, with the ends of the third support column 108 respectively abutting the power conversion board 102 and the communication control board 105.

[0048] In some embodiments, optionally, the first support column 106 , the second support column 107 , and the third support column 108 have different lengths.

[0049] In these embodiments, the lengths of the first support column 106, the second support column 107, and the third support column 108 can be set to different values. This allows the DC circuit board 103, the AC circuit board 104, and the communication control board 105 to be spaced apart from the power conversion board 102 at different intervals. In other words, the DC circuit board 103, the AC circuit board 104, and the communication control board 105 are staggered and not located on the same horizontal plane, thereby increasing the space for air circulation and improving heat dissipation. Furthermore, staggering the DC circuit board 103, the AC circuit board 104, and the communication control board 105 ensures a sufficient electrical distance between the circuit boards, thereby reducing electromagnetic interference, saving space, and facilitating wiring and maintenance.

[0050] In some embodiments, optionally, as Figure 3 As shown, the DC circuit board 103, the communication control board 105 and the AC circuit board 104 are arranged in sequence from left to right.

[0051] In some embodiments, optionally, the output interface 101 includes: a DC interface 1012, electrically connected to the DC circuit board 103; a communication interface 1014, electrically connected to the communication control board 105; an AC interface 1016, electrically connected to the AC circuit board 104; the DC interface 1012, the communication interface 1014 and the AC interface 1016 are arranged in sequence along the first direction.

[0052] In these embodiments, the output interface 101 includes a DC interface 1012, an AC interface 1016, and a communication interface 1014. The DC interface 1012 is electrically connected to the DC circuit board 103. The communication interface 1014 is electrically connected to the communication control board 105. The AC interface 1016 is electrically connected to the AC circuit board 104. The DC interface 1012, the communication interface 1014, and the AC interface 1016 are arranged sequentially along a first direction. It is understood that the DC interface 1012, the communication interface 1014, and the AC interface 1016 are arranged relative to the DC circuit board 103, the communication control board 105, and the AC circuit board 104, and are all arranged along the first direction. This facilitates connection between the DC interface 1012 and the DC circuit board 103, the AC interface 1016 and the AC circuit board 104, and the communication control board 105 and the communication interface 1014, further optimizing the internal structural layout of the energy storage inverter and making wiring clearer.

[0053] In some embodiments, the DC interface 1012 can optionally be connected to a power source such as a photovoltaic terminal or a battery terminal. The communication interface 1014 can be connected to various interfaces, such as an electric meter, a transformer, a parallel generator, a BMS (Battery Management System), an ATS (Automatic Transfer Switch), and a heat pump. The AC interface 1016 can be connected to a diesel generator, a power grid, or a load.

[0054] In some embodiments, optionally, the energy storage inverter further includes: a heat sink 109 installed in the box 100 for dissipating heat from the power conversion board 102 .

[0055] In these embodiments, a radiator 109 may be further provided on the housing 100 to dissipate heat from the power conversion board 102 , thereby ensuring the performance and service life of the power conversion board 102 .

[0056] In some embodiments, the power conversion board 102 can be mounted on the heat sink 109 to improve the heat dissipation effect of the heat sink 109. Specifically, a heating element 1022 is mounted on the power conversion board 102, and the heating element 1022 can be mounted on the heat sink 109.

[0057] In some embodiments, optionally, a hollow structure 1002 is provided on the side wall of the box body 100 , the radiator 109 is installed outside the box body 100 and is located at the hollow structure 1002 , and the side of the power conversion board 102 facing away from the DC circuit board 103 is in contact with the radiator 109 .

[0058] In these embodiments, a hollow structure 1002 can be provided on the side wall of the housing 100, and then the radiator 109 can be installed outside the housing 100 and located at the hollow structure 1002. In this way, the power conversion board 102 in the housing 100 can be placed in contact with the radiator 109 through the hollow structure 1002, thereby further improving the heat dissipation effect. Specifically, the heating element 1022 on the power conversion board 102 can be placed in contact with the radiator 109.

[0059] In some embodiments, optionally, the heat sink 109 is mounted outside the box 100 by screws.

[0060] In some embodiments, optionally, the heating device 1022 includes an IGBT (Insulate-Gate Bipolar Transistor), the heat sink 109 includes a ceramic sheet, and the IGBT is bonded to the ceramic sheet in the groove of the heat sink 109 .

[0061] In some embodiments, optionally, the energy storage inverter further includes: a DC inductor component 110, installed in the box 100 and arranged close to the DC circuit board 103; an AC inductor component 111, installed in the box 100 and arranged close to the AC circuit board 104, and the DC inductor component 110 and the AC inductor component 111 are arranged on opposite sides of the radiator 109.

[0062] In these embodiments, the DC inductor assembly 110 and the AC inductor assembly 111 can also be independently set, so that the DC inductor assembly 110 processes DC power and the AC inductor assembly 111 processes AC power. This not only increases the efficiency of power processing, but also allows the DC inductor assembly 110 and the AC inductor assembly 111 to be independently disassembled and replaced, thereby facilitating daily maintenance and troubleshooting. In specific settings, the DC inductor assembly 110 can be set close to the DC circuit board 103, and the AC inductor assembly 111 can be set close to the AC circuit board 104, thereby facilitating the connection between the DC inductor assembly 110 and the DC circuit board 103, and facilitating the connection between the AC inductor assembly 111 and the AC circuit board 104, further simplifying the overall structure of the energy storage inverter. At the same time, the DC inductor assembly 110 and the AC inductor assembly 111 are set on opposite sides of the heat sink 109, so that the heat sink 109 can be used to reduce the electromagnetic interference between the DC inductor assembly 110 and the AC inductor assembly 111.

[0063] In some embodiments, optionally, as Figure 2 As shown, the DC inductor assembly 110 includes a DC inductor box 1102, a DC inductor, and a transformer. The DC inductor box 1102 is mounted on the housing 100, and the DC inductor and transformer are disposed within the DC inductor box 1102. This protects the DC inductor and transformer and also dissipates heat.

[0064] In some embodiments, optionally, as Figure 2 As shown, the AC inductor assembly 111 includes an AC inductor box 1112, a boost inductor, and an AC inductor. The AC inductor box 1112 is mounted on the housing 100, and the AC inductor and the boost inductor are disposed within the AC inductor box 1112. This protects the AC inductor and the boost inductor and also dissipates heat.

[0065] In some embodiments, optionally, the energy storage inverter further includes: a filter board 112 , which is disposed in the box 100 and located at the output interface 101 .

[0066] In these embodiments, a filter board 112 may be provided in the housing 100 for filtering to prevent electromagnetic interference. Specifically, the filter board 112 may be provided at the output interface 101 , which can improve the filtering effect.

[0067] In some embodiments, the filter board 112 optionally includes a DC filter board, an AC filter board, and a communication filter board 1122. The DC filter board is provided at the DC interface 1012, the AC filter board is provided at the AC interface 1016, and the communication filter board 1122 is provided at the communication interface 1014.

[0068] In some embodiments, optionally, the energy storage inverter further includes: a conductive column 113 , through which the power conversion board 102 and the DC circuit board 103 are electrically connected, and the power conversion board 102 and the AC circuit board 104 are electrically connected.

[0069] In these embodiments, conductive posts 113 can be used to electrically connect the power conversion board 102 to the DC circuit board 103, and also to electrically connect the power conversion board 102 to the AC circuit board 104. Providing conductive posts 113 for electrical connection further simplifies the internal layout of the energy storage inverter, making the interior clearer and more concise, thereby facilitating maintenance and repair. The specifications and quantity of conductive posts 113 can be set based on actual conductivity requirements.

[0070] In some embodiments, optionally, the conductive pillars 113 are copper conductive pillars.

[0071] In some embodiments, optionally, the energy storage inverter further includes: a communication line bus, through which the power conversion board 102 and the DC circuit board 103 are electrically connected, and through which the power conversion board 102 and the AC circuit board 104 are electrically connected.

[0072] In this embodiment, when the electric energy is weak, electrical connection can be made through the communication line bank, avoiding connection through cables.

[0073] In some embodiments, optionally, as Figure 5 and Figure 6 As shown, the energy storage inverter further includes: a cover 115 , which is installed on the box body 100 and is used to seal the box body 100 .

[0074] In some embodiments, optionally, the energy storage inverter further includes a mounting bracket 114 , which can be connected to the heat sink 109 , the DC inductor assembly 110 , and the AC inductor assembly 111 , and then the energy storage inverter can be installed as a whole through the mounting bracket 114 .

[0075] In some embodiments, optionally, the energy storage inverter is a household energy storage inverter.

[0076] According to an embodiment of the first aspect of the present invention, the first aspect of the present invention proposes an energy storage inverter, including a housing, a cover, a PCBA, an external interface (output interface), a heat sink and an inductor box. The housing is used to install and fix the heat sink, inductor box, PCBA and external interface of the energy storage inverter. The cover is provided on the upper side of the housing and is used to seal the housing. The PCBA is provided in the housing and is divided into a DC circuit board, a DC filter board, an AC circuit board, an AC filter board, a communication control board, a communication filter board and a power conversion board, etc. The external interface is provided on the side wall of the housing and is used to install the external connector of the household energy storage inverter, and is divided into a DC interface, an AC interface and a communication interface. The heat sink is provided at the bottom of the housing and is used to dissipate heat for the power devices on the power conversion board. The inductor box is provided at the bottom of the housing and is used to dissipate heat for the inductor element, and is divided into a DC inductor box and an AC inductor box.

[0077] In some embodiments, optionally, the external interface of the box is divided into three parts from left to right: a DC area, a communication area, and an AC area.

[0078] In some embodiments, optionally, the circuit boards inside the box are arranged in sequence from left to right including a DC circuit board, a communication control board, and an AC circuit board.

[0079] In some embodiments, optionally, a power conversion board is arranged at the bottom of the box, and the power device is directly connected to the heat sink.

[0080] In some embodiments, optionally, a DC filter board, a communication filter board, and an AC filter board are arranged in sequence from left to right at the line outlet on the inner wall of the box.

[0081] In some embodiments, optionally, a DC inductor box, a heat sink, and an AC inductor box are arranged in sequence from left to right at the bottom of the box.

[0082] In some embodiments, optionally, the PCBAs inside the box are arranged at different heights in the cavity and supported and fixed by support columns, maintaining a reasonable electrical distance between them.

[0083] According to one embodiment of the first aspect of the present invention, an energy storage inverter is provided. The energy storage inverter comprises a housing, a cover, a heat sink, an inductor assembly, a mounting bracket, a PCBA, an interface connector, and support columns. The external wiring interface of the energy storage inverter is divided into three sections, from left to right: a DC interface area, a communication interface area, and an AC interface area. The DC interface area can connect to power sources such as photovoltaic terminals and batteries. The communication interface area can connect to various interfaces, such as electricity meters, transformers, parallel generators, BMSs, ATSs, and heat pumps. The AC interface area can connect to diesel generators, the power grid, and loads. The inductor assembly is housed in two separate DC and AC inductor boxes, located in the corresponding areas of the DC and AC interfaces.

[0084] The corresponding PCBA layout is set up inside the box: the PCBA is set up inside the box and is divided into DC circuit board, AC circuit board, communication control board, communication filter board, power conversion board, etc. The internal PCBA layout corresponds to the external interface layout and the layout of heat dissipation components. The boards are modularized and fixed with support columns. Copper guide columns are used for strong current connection to connect the PCBA. For example, the DC circuit board and the power conversion board are connected through a group of copper guide columns. The AC circuit board and the power conversion board are connected through double copper guide columns. The specifications and number of copper columns are determined according to the designed circuit current. Communication cables are used for weak current to minimize the number of internal cable connections. When cables must be used, the length of the external connection cables or copper busbars should be shortened as much as possible. This solves the problems of complex and confusing internal wiring of the energy storage hybrid inverter, difficult maintenance, irregular layout of the box interface, and excessively long lead wires.

[0085] Internal PCBA Layout: The PCBAs inside the enclosure are arranged at different heights within the cavity, supported and fixed by support columns, maintaining a reasonable electrical distance between them. Support columns are of different heights depending on the distance between the boards. A heat sink is installed at the bottom of the enclosure, and the heat generating components of the power board are directly attached to the heat sink.

[0086] The core function of the energy storage hybrid inverter is current conversion. Depending on the operating conditions, it performs DC (Direct Current) / DC, DC / AC (Alternating Current), and AC / DC current conversion. Therefore, while continuing to use the power conversion board, this application centralizes the circuitry carrying the DC input and output lines into a DC circuit board, integrates the weak current components used for communication and control into a communication control board, and integrates the circuitry carrying the AC input and output lines into an AC circuit board. These three functional module circuit boards are arranged sequentially from left to right around the power conversion board. The inductor and transformer components are also separated into two sections: the DC inductor and transformer are co-located in a DC inductor box, and the boost inductor and AC inductor are co-located in an AC inductor box, corresponding to the corresponding positions on the DC circuit board and AC circuit board, respectively. Finally, the external interfaces are divided into the DC interface area, the communication interface area, and the AC interface area, from left to right. High-current connections are required between the DC circuit board, the AC circuit board, and the power board, so copper pillar connections are arranged between the boards to increase current carrying capacity and eliminate cable connections. This corresponding arrangement clearly defines the functional modules and facilitates maintenance and repair. The number of cable connections is reduced, and the length of the cables that must be connected is also greatly shortened, making product assembly simple and the internal and external layout clear and well-defined.

[0087] The key points of this application are:

[0088] Set up the corresponding PCBA layout on the external interface and internal of the energy storage inverter:

[0089] 1. The external wiring interface is divided into three parts from left to right: DC area, communication area, and AC area.

[0090] 2. The internal circuit boards are arranged from left to right as DC circuit board, control and communication circuit board, and AC circuit board.

[0091] 3. The power conversion board is arranged at the bottom, and the power devices are directly connected to the radiator.

[0092] 4. The upper and lower PCBAs are fixed with support columns, and copper guide columns are used for strong electrical connections to connect the PCBAs.

[0093] 5. The weak current part is connected using flat cables.

[0094] 6. The outlet of the box adopts a vertically mounted PCBA filter board.

[0095] 7. The inductor components are placed in two inductor boxes, AC and DC, and placed in the corresponding areas of the DC board and AC board.

[0096] This application adopts a modular layout structure with clear area divisions, that is, the internal PCBA layout corresponds to the external interface layout and the heat dissipation component layout. The modular board solution aims to solve the problems of complex and chaotic internal wiring of the energy storage hybrid inverter, difficult maintenance, irregular box interface layout, and excessively long lead wires.

[0097] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can refer to a fixed connection, a detachable connection, or an integral connection; "connected" can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0098] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An energy storage inverter, characterized in that: include: Box; A plurality of output interfaces are provided on the side wall of the box; A power conversion board is arranged in the box; a DC circuit board, disposed in the box and electrically connected to the power conversion board and the output interface; an AC circuit board, disposed in the box and electrically connected to the power conversion board and the output interface; A communication control board is arranged in the box and is electrically connected to the power conversion board and the output interface. The DC circuit board, the communication control board and the AC circuit board are all arranged on the same side of the power conversion board and are arranged in sequence along the first direction.

2. The energy storage inverter according to claim 1, characterized in that: Along the thickness direction of the power conversion board, a gap is set between the DC circuit board and the power conversion board, a gap is set between the communication control board and the power conversion board, and a gap is set between the AC circuit board and the power conversion board.

3. The energy storage inverter according to claim 1, characterized in that: Also includes: a first support column, disposed between the power conversion board and the DC circuit board, wherein two ends of the first support column respectively abut against the power conversion board and the DC circuit board; a second supporting column, disposed between the power conversion board and the AC circuit board, wherein two ends of the second supporting column respectively abut against the power conversion board and the AC circuit board; The third supporting column is arranged between the power conversion board and the communication control board, and two ends of the third supporting column are respectively in contact with the power conversion board and the communication control board.

4. The energy storage inverter according to claim 3, characterized in that: The first supporting column, the second supporting column and the third supporting column have different lengths.

5. The energy storage inverter according to claim 1, characterized in that: The output interface includes: a DC interface, electrically connected to the DC circuit board; a communication interface, electrically connected to the communication control board; an AC interface, electrically connected to the AC circuit board; The DC interface, the communication interface, and the AC interface are sequentially arranged along a first direction.

6. The energy storage inverter according to any one of claims 1 to 5, characterized in that: Also includes: A radiator is installed on the box body and is used to dissipate heat from the power conversion board.

7. The energy storage inverter according to claim 6, characterized in that: The side wall of the box body is provided with a hollow structure, the radiator is installed outside the box body and is located at the hollow structure, and the side of the power conversion board facing away from the DC circuit board is arranged in contact with the radiator.

8. The energy storage inverter according to claim 6, characterized in that: Also includes: A DC inductor assembly is installed in the box and is arranged close to the DC circuit board; The AC inductor component is installed in the box and is arranged close to the AC circuit board. The DC inductor component and the AC inductor component are arranged on two opposite sides of the radiator.

9. The energy storage inverter according to any one of claims 1 to 5, characterized in that: Also includes: The filter board is arranged in the box and located at the output interface.

10. The energy storage inverter according to any one of claims 1 to 5, characterized in that: Also includes: Conductive posts, the power conversion board and the DC circuit board are electrically connected through the conductive posts, and the power conversion board and the AC circuit board are electrically connected through the conductive posts.

Images